Category: ScienceNews

Every month, 1.8 billion people menstruate globally. For those people, managing periods is essential for strong reproductive and emotional health, social wellbeing and bodily autonomy. But a lot of people haven't been educated about periods or the menstrual cycle since they were kids — if at all.

This episode, a period manual in four parts: How periods work, the different stages of the menstrual cycle, how to know when something's wrong, and whether to have a period in the first place.

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Speaking to Short Wave from about 250 miles above the Earth, Josh Cassada outlined his typical day at work: "Today, I actually started out by taking my own blood," he said. The astronauts aboard the International Space Station are themselves research subjects, as well as conductors of all sorts of science experiments: Gardening in microgravity, trapping frigid atoms, examining neutron stars. Then, there's the joy of walks into the yawning void of space. Speaking from orbit, Cassada told fellow physicist and Short Wave Scientist in Residence Regina G. Barber about research aboard the station, what it takes to keep the ISS going and which countries' astronauts make the best food.

Curious about the other goings-on in space? Beam us an email at shortwave@npr.org — we might answer it in a future episode!

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In the most innocent interpretation, suggesting someone should ‘do their own research’ is a reasonable bit of advice. But in the superheated world of social media discourse, #DoYourOwnResearch is a spicy rejoinder that essentially challenges someone to Google the subject since they clearly don’t know what they’re talking about. But Googling, social psychologist David Dunning pointedly notes, is not research. “The beauty and the terror of the internet,” he tells interviewer David Edmonds in this Social Science Bites podcast, “is that there’s a lot of terrific information, but there’s also a lot of misinformation and sometimes outright fraud.

“People often don’t have the wherewithal to distinguish.”

This distinguishing is an area where Dunning, a professor at the University of Michigan, does his own research.

While doing your own internet sleuthing isn’t toxic on its face, Dunning suggests that often “you don’t know when you’re researching your way into a false conclusion, and … you don’t know when to stop. The real hard problem with DYOR is when do you know when to stop: you go and you look at a couple of web pages, and ‘Well, you’ve learned something! Terrific!’ But you don’t know how much there is behind it that you still need to learn.”

One driver of DYOR, Dunning adds, is the idea that gaining (and deploying) knowledge is one’s own responsibility, which pretty much runs counter to science, which sees gaining knowledge as a collective enterprise.

One piece of collective effort in which Dunning has made a very public mark is in describing what’s come to be known as the Dunning-Kruger effect, named for Dunning and fellow social psychologist Justin Kruger of New York University, after work they originally described two decades ago in “Unskilled and unaware of it: How difficulties in recognizing one's own incompetence lead to inflated self-assessments” in the Journal of Personality and Social Psychology. The popular definition of the Dunning-Kruger effect, Dunning explains, is that “people who are incompetent or unskilled or not expert in a field lack expertise to recognize that they lack expertise. So they come to conclusions, decisions, opinions that they think are just fine when they’re, well, wrong.”

Dunning and Kruger’s initial research was based on simple tests – of grammar, logical thinking, classical psychology quizzes, even sense of humor – asking subjects how well they think they’re doing relative to everyone else. They found that the bottom 25 percent of participants tended to think they were doing above average. “But no.”

“To know what you don’t know,” he offers, “you need to know what you need to know to realize that your thinking diverges from that.”

It’s not true in every endeavor, he adds. “I’m a terrible golfer,” Dunning says. “And I’m fully aware that I‘m a terrible golfer!” The effect tends to show up when the skill of assessing outcomes is roughly similar to the skill of achieving outcomes. So when your golf ball flies into the nearby body of water, you don’t need special skills to know that’s bad.

Becoming an expert in everything is out of the question; the real skill will be in identifying who is a legitimate expert and drawing on their insights. (And the right expert, Dunning notes “is the right experts. With an S on the end.”)

For the record, the pair – who just received the 2023 Grawemeyer Award in Psychology for their Dunning-Kruger effect work - did not name the concept after themselves, although, as Dunning says, they’re “tickled pink that our names will forever be associated with the nincompoops, incompetent ignorant cranks, if you will.”

Time is woven into our personal memories. If you recall a childhood fall from a bike, your brain replays the entire episode in excruciating detail: The glimpse of wet leaves on the road ahead, that moment of weightless dread and then the painful impact. This exact sequence has been embedded into your memory thanks to some special neurons known as time cells. Science correspondent Jon Hamilton talks to Emily about these cells — and why the label "time" cells is kind of a misnomer.

Concerned about the space-time continuum? Email us at shortwave@npr.org — using science, we might be able to set you at ease in a future episode.

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To ring in the new year, producer Berly McCoy brings host Emily Kwong this homemade science mad lib!

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NASA's James Webb Space Telescope has produced amazing images in its first 5 months, but amazing science as well. Roland hears from one of the leading astronomers on the JWST programme, Dr Heidi Hammel, as well as other experts on what they are already learning about the first galaxies in the Universe, the birth places of stars, the strange behaviour of some other stars, and the first view of Neptune's rings in over 30 years.

Over the past 12 months, CrowdScience has travelled the world, from arctic glacierscapes to equatorial deserts, to answer listeners’ science queries. Sometimes, the team come across tales that don’t quite fit with the quest in hand, but still draw a laugh, or a gasp. In this show, Marnie Chesterton revisits those stories, with members of the CrowdScience crew.

Alex the Parrot was a smart bird, with an impressive vocabulary and the ability to count and do basic maths. He was also intimidating and mean to a younger parrot, Griffin, who didn’t have the same grasp of the English language. Scientist Irene Pepperberg shares the consequence of this work-place bullying. 

Take a tour of the disaster room at ICPAC, the IGAD Climate Prediction and Applications Centre (ICPAC) based in Nairobi, Kenya. It’s a new building where scientists keep watch for weird new weather and passes that information to 11 East African countries. Viola Otieno is an Earth Observation (EO) Expert and she explained how they track everything from cyclones to clouds of desert locust.

Malcolm MacCallum is curator of the Anatomical Museum at Edinburgh University in Scotland, which holds a collection of death masks and skull casts used by the Edinburgh Phrenological Society. Phrenology was a pseudoscience, popular in the 1820s, where individuals attempted to elucidate peoples’ proclivities and personalities by the shape of their heads. We see what the phrenologists had to say about Sir Isaac Newton and the “worst pirate” John Tardy.

While recording on Greenland’s icesheet, the CrowdScience team were told by Professor Jason Box about “party ice.” 40,000 year old glacial ice is a superior garnish for your cocktail than normal freezer ice, apparently. This starts a quest for the perfect Arctic cocktail.

Image: An image from the James Webb Space Telescope (Credit: Nasa via PA)

Over the past 12 months, CrowdScience has travelled the world, from arctic glacierscapes to equatorial deserts, to answer listeners’ science queries. Sometimes, the team come across tales that don’t quite fit with the quest in hand, but still draw a laugh, or a gasp. In this show, Marnie Chesterton revisits those stories, with members of the CrowdScience crew.

Alex the Parrot was a smart bird, with an impressive vocabulary and the ability to count and do basic maths. He was also intimidating and mean to a younger parrot, Griffin, who didn’t have the same grasp of the English language. Scientist Irene Pepperberg shares the consequence of this work-place bullying. 

Take a tour of the disaster room at ICPAC, the IGAD Climate Prediction and Applications Centre (ICPAC) based in Nairobi, Kenya. It’s a new building where scientists keep watch for weird new weather and passes that information to 11 East African countries. Viola Otieno is an Earth Observation (EO) Expert and she explained how they track everything from cyclones to clouds of desert locust.

Malcolm MacCallum is curator of the Anatomical Museum at Edinburgh University in Scotland, which holds a collection of death masks and skull casts used by the Edinburgh Phrenological Society. Phrenology was a pseudoscience, popular in the 1820s, where individuals attempted to elucidate peoples’ proclivities and personalities by the shape of their heads. We see what the phrenologists had to say about Sir Isaac Newton and the “worst pirate” John Tardy.

While recording on Greenland’s icesheet, the CrowdScience team were told by Professor Jason Box about “party ice.” 40,000 year old glacial ice is a superior garnish for your cocktail than normal freezer ice, apparently. This starts a quest for the perfect Arctic cocktail.

Presented by Marnie Chesterton 

Produced by Marnie Chesterton, featuring producers Florian Bohr, Sam Baker and Ben Motley 

(Photo:)

From misty eyeballs to full-on waterworks, what are tears? Why do we shed them? And what makes humans' ability to cry emotional tears unique? Hosts Emily Kwong and Aaron Scott get into their feelings in this science-fueled exploration of why we cry. (encore) To see more of Rose-Lynn Fisher's images from Topography of Tears, visit her website.

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Nasa's James Webb Space Telescope has produced amazing images, and amazing science, in its first five months. Roland Pease hears from one of the leading astronomers on the JWST programme, Dr Heidi Hammel, as well as other experts on what they are already learning about the first galaxies in the Universe, the birthplaces of stars, the strange behaviour of some other stars, and the first view of Neptune's rings in over 30 years.

Producer: Roland Pease Assistant producer: Sophie Ormiston

Image: An image from the James Webb Space Telescope (Credit: Nasa via PA)

In 1967, Jocelyn Bell Burnell made a discovery that revolutionized astronomy. She detected the radio signals emitted by certain dying stars called pulsars. Today, Jocelyn's story. Scientist-in-residence Regina G. Barber talks to Jocelyn about her winding career, her discovery and how pulsars continue to push the field of astronomy today. (encore)

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